<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <title>test</title>
</head>
<body>
<select <warning>width</warning>="1" ><option>xxx</option></select>
</body>
</html>